Improvement in paper-bag machines



H. a. ARMSTRONG'.

Paper-Bag Machines. N0. 13g-,110121. Patented May 20,1873" UNITED STATESPATENT OFFICE.

HoEATIo e. ARMSTRONG, 0E TEENToN, NEw JERSEY.

IMPROVMENT IN PAPER-BAG MACHINES.

Specification forming part of Letters Patent N o. 139,104, dated May 20,1873; application filed r October 9, 1872.

To all whom tt may concern:

Be it known that I, HoRATIo G. AEM- STRONG, of Trenton, Mercer county,New J er sey, have invented Improvements in Paper- Bag Machines, ofwhich the following is a specification My invention has for its mainobjects, flrst, the distribution of a uniform layer of paste on thecontinuous strip of paper preparatory to the same being folded into atube; second, to make bags of dierent lengths without any otheralteration of the machine than that of simply changing the speed of thedevice for pasting the bottom of each bag and the striker for severingthe tube; and, third, to paste and fold the bottom of the bag by the aidof very simple and effective mechanism.

I attain the irst object by causing the paper C to pass between therollers d and e, the latter receiving and transferring to the paper asupply of paste derived from the circuln ference of a disk, F, whichrevolves in paste contained in a trough, all as best observed in thesectional view, Figure 2, of the accompanying drawing. The second objectI attain by causing the device which pastes and folds the bottom ofthebag to operate in unison -with the device for severing the paper tube,

and by so connecting both devices to the machine that their speed inrelation to that of the paper tube can be altered in accordance with thedesired length of the bag. l attain the third object of my invention bycausing a vibrating reservoir, Q, to paste the end of the paper tube andthrust it between the folding-rolls P P', as best observed in Fig. 3.

'lhe frame of the machine consists, in the present instance, of theopposite castings A and A', (see plan view, Fig. 1,) connected togetherby cross-stays at suitable points, and on the front end of this framerests an adjustable plate or board, B, having standards a a, in whichrevolves a spindle, b, carrying the roll of paper C to be converted intobags. The paper, drawn rearward in the manner described hereafter,passes between the rollers d and e, both of which turn in slots instandards'e, secured to aplate, D, which rests and can be adjusted onthe frame of the machine. To this board is secured a trough, E,containing paste, in which part of the disk F revolving in the trough isimmersed, the roller e bearing on the periphery of the disk., all asbest observed in the vertical section, Fig. 2. The movement of the papercauses the three rollers 01,6, and F to turn, and the consequence ofthis is the carrying of a supply of paste` by the disk F to the rollere, which transfers the paste to the under side of the paper at one edgeot the same. This pasting apparatus is a special feature of myinvention, as it insures the spreading of the paste in a proper quantityand in a layer ot' uniform width, determined by that of the disk F. Thepaper passes from this pasting device beneath a bridge, G, secured to aplatform, H, situated between the Aframes A and A and beneath a blade,I, the front end of which is so attached to a leg, f, on the bridge thatit shall be elevated a short distance above the platform H, betweenwhich and the said blade the paper can consequently pass freely. Inpassing through the bridge the opposite edges 0f the paper are graduallyturned upward and folded, the unpasted edge over that to which a uniformlayer of paste has been imparted in the manner described above, and atube of paper is thus formed round the blade I, the tube passing betweentwo adjustable guides, l1. h, and beneath a plate, c, the weight ot'which aids in securing the unpasted to the pasted edge of the tube.Immediately at the rear of these guides h h are the drawing-rollers Jand K, all driven in the direction ot' the arrows, the lower roller, inthe present instance, forming or being secured to the driving-shaft ofthe machine, and the upper roller being recessed to receive the blade,which is made narrow at this point, so that the paper only is seized bythe rollers, and is drawn rearward by the same over the stationary bladein the direction ofthe arrow. The blade terminates immediately in frontof the revolving bar L, and at this point is a blade, M, best observedin the vertical section, Fig.`3, this blade being above but in contact,or nearly so, with the tube of paper, so that the revolving bar willstrike the under side of the tube and sever the same by tearing itagainst the end ot' the blade I and edge of the blade M,y and these Yblades are so arranged that one-half ofl the end of the severed tubeshall project beyond so as to be pasted over the end of the other halfin forming the bottom of the bag.

The above-described devices for forming and drawing the tube of paperover a blade and severing the tube are to be found in my patent ofOctober 2, 1860, No. 30,191.

At the rear of the striking-bar two foldingrolls, P P', are caused torevolve in the direction of the arrows, and above these rollers is avibrating paste-reservoir, terminating at the lower end in acomparatively sharp-edged blade, (See diagram, Fig. 4.) The duty of thisreservoir is twofold; it transmits a supply of paste to the end of thepaper tube, creases the same and depresses it between the folding-rolls.

It should be understood that the tube is seized by these folding-rollsbefore the bar L strikes and tears it against the blades I and M.Trunnions on the trough Q are hung to the ends of the two arms N and Nsecured to arock-shaft, m, an arm on which is connected by a rod, n, toa crank on the shaft p, the latter deriving its motion from the shaft ofthe lower drawing-roller K. A In the present instance a band, g, is usedfor transmitting this motion, and may be adjusted to wheels of differentdiameters, so as to change the speed of the shaft p in respect to thatof the drawing-rollers positive gearing may, however, be used for thesame purpose, providing it be such that the relative speed of thedriving and driven shafts can be changed at pleasure. On one of thetrunnions of the trough Q is secured an arm, R, a pin on which isadapted to the segmental guides S as the trough vibrates. Near the lowerend of the trough, and extending from end to end of the same, is anopening for the admission of a roller, t, which is arranged to fit intoand close, or nearly close, the said opening, and is furnished with aratchet-wheel, u, to the teeth of which a spring-pawl, o, hung to one ofthe arms N, is adapted, another pawl, shown in dotted lines, Fig. 3,being hung to the trunnion of the trough, and serving as aretainingpawl.

Owing to the segmental guide S a slight oscillating motion on itstrunnion is imparted to the trough Q while it vibrates vertically; hencethe ratchet-wheel, and with it the roller t, is turned at intervals, andthis turning of the roller controls the ow of paste from the reservoir Qand induces a proper supply of the same to pass to thelip or blade whichforms the lower termination of the reservoir, and by which, inconjunction with the rollers P P', the end of the tube is creased andfolded, a supply of paste from the reservoir being con-' tained withineach fold. The striking-arm L is attached to a shaft, L', which derivesits motion through the medium of miter-wheels from the shaft p, so thatthe striker and paster must invariably operate in unison.

Presuming the drawing-rollers J and K to invariably revolve, and thetube of paper to consequently traverse at a uniform speed, the length ofthe bag will depend upon the rate of speed with which the paster andstriker operate in respect to the speed with which the tube traverses gthe faster the paster and striker operate the shorter will be the bags,and the slower they operate the longer will be the bags; hence, tochange the length of the bags made by the machine, all that is necessaryis to change the speed of the paster and striker.

The folding-rolls are driven in the direction pointed out by the arrows,in the present instance by a band from the driving-shaft.

I claim as my invention- 1. ln a paper-bag machine, the combination ofdrawing-rolls with a device for pasting and folding the bottom of thebag, and a striker for severing the tubes, and the appliances described,or their equivalents, for changing the speed of said paster in respectto that at which the tube traverses, for the purpose specified.

2. The vertically-vibratin g paste-reservoir Q, having near its lowerend a roller, t, actuated by the mechanism described, or its equivalent,for inducing the paste to pass to the creaser at the lower end of thereservoir, as specified. p

In testimony whereof I have signed lnyname to this speciiication in thepresence of two subscribing witnesses.

HORATIO G. ARMSTRONG.

Witnesses:

WM. A. STEEL, JOHN K. RUPERTUs.

